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81557-66-6

81557-66-6

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81557-66-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 81557-66-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,1,5,5 and 7 respectively; the second part has 2 digits, 6 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 81557-66:
(7*8)+(6*1)+(5*5)+(4*5)+(3*7)+(2*6)+(1*6)=146
146 % 10 = 6
So 81557-66-6 is a valid CAS Registry Number.

81557-66-6Downstream Products

81557-66-6Relevant articles and documents

CATALYTIC REDUCTIVE DEHALOGENATION OF THIOPHENE DERIVATIVES

Sharf, V. Z.,Taits, S. Z.,Gurovets, A. S.,Vol'kenshtein, Yu. B.,Fabrichnyi, B. P.,Shcherbakova, S. I.

, p. 130 - 133 (2007/10/02)

A method for the preparation of 3-substituted derivatives of thiophene by reductive dehalogenation of 2,5-dihalo-substituted thiophenes in the presence of a palladium complex is proposed.The dehalogenation reaction is a stepwise process.The presence of an acyl group in the 3 position increases the rate of the process.

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